|Disturbance Observer Based Output Feedback Controller Design for Systems with Mismatched Disturbance
Jeang-Lin Chang* and Tsui-Chou Wu
International Journal of Control, Automation, and Systems, vol. 16, no. 4, pp.1775-1782, 2018
Abstract : "For linear MIMO systems with mismatched unknown perturbations, this paper proposes a dynamic
output feedback controller that uses a disturbance estimation algorithm. The proposed observer algorithm, which
simultaneously estimates the system sates and the effect of an input disturbance, is successfully implemented in
non-minimum phase systems. The developed control law, which uses estimation information into the controller
design, can guarantee robust stabilization of the closed-loop system and sustain disturbance attenuation when the
solutions to two algebraic Riccati inequalities are determined. Finally, the feasibility of the proposed method is
illustrated using a numerical example."
Disturbance observer, dynamic output feedback, mismatched disturbance, non-minimum phase.